Pilot-operated relief valve 750-60

The Cla-Val 750-60 Fire Hydrant Pressure Relief Valve, offered in 2 1/2" or 4" threaded connections, is built using 316L stainless steel. The only movable component of the equipment is the elastomeric liner. The valve also features a female fire hose port on the its inlet side, and a male hose on its outlet side. Cla-Val 750-60 Fire Hydrant Pressure Relief Valve is operated hydraulically with a pilot-triggered automated control. Once the pressure becomes excessive, the valve will open while releasing enough pressure to regulate incoming pressure. The Cla-Val 750-60 Fire Hydrant Pressure Relief Valve balances the pressure for exhaustion of line pressure. This set point is pre-determined over the whole spring range. The Cla-Val Fire Hydrant Pressure Relief Valve will control from no flow to full open flow without any chattering or slamming under low flow conditions. There is no slip-type friction because the main valve has no bearings. Control systems are fully piped at the factory and the Cla-Val Fire Hydrant Pressure Relief Valve is shipped complete, ready for installation. Valve and control system shall maintain inlet pressure at a predetermined set point; shall open as pressure starts to increase above the set point, and close as pressure falls below the set point. Control valve shall be constructed of two parts: an 316L stainless steel body and an elastomeric liner or control element. Minimum rangeability shall be 500:1 based on capacity at flowing pressure conditions. Cf shall be greater than or equal to 0.9. Valve and control system shall be similar in all respects to Cla-Val Fire Hydrant Pressure Relief Valve as manufactured by Cla-Val, Newport Beach, California.